I'm getting an exception when I try to delete an event on the Sforce side. 

DELETE SOAP ERROR: UNKNOWN_EXCEPTION, java.sql.SQLException: ORA-20008:
ORA-06512: at "BUILD134R4A.CACCESS", line 302
ORA-06512: at "BUILD134R4A.CACCESS", line 592
ORA-06512: at "BUILD134R4A.CACCESS", line 691
ORA-06512: at "BUILD134R4A.CEVENT", line 604
ORA-06512: at line 1

The current logic in our application (which does Synchronization) is that when there is an error, to not commit the record on our side (in this case, a delete) and rollback the transaction.  This way we can try to stay "in sync" with the SalesForce server. 

Is this an exception that I should be expecting normally?  Or is there a differnet error that will be returned in the future?